<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/02.jpeg" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="back">退出</el-button>
        </el-header>
        <!-- 页面主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="iscollapse?'64px':'200px'">
                <!-- 折叠展开收起按钮 -->
                <div class="toggle-button" @click="togglebutton">|||</div>
                <!-- 侧边栏菜单区域 -->
                <el-menu background-color="#333744" text-color="#fff" active-text-color="#409FFF" :unique-opened='true'
                    :collapse='iscollapse' :collapse-transition='false' :router='true' :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                        <!-- 一级菜单的模板区域 -->
                        <template slot="title">
                            <!-- 菜单图标 -->
                            <i :class="iconobj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/'+subitem.path+''" v-for="subitem in item.children" :key="subitem.id"
                            @click="saveNavState('/'+subitem.path)">
                            <template slot="title">
                                <!-- 菜单图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subitem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 右侧内容主体 -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>
<script>
    export default {
        data() {
            return {
                //左侧菜单数据
                menuList: [],
                //一级分类的菜单图标对象
                iconobj: {
                    125: 'el-icon-user-solid',
                    103: 'el-icon-view',
                    101: 'el-icon-present',
                    102: 'el-icon-document',
                    145: 'el-icon-s-marketing'
                },
                // 控制展开折叠按钮的开关
                iscollapse: false,
                //被激活的链接地址
                activePath: ''

            }
        },
        created() {
            this.getmenuList();
            this.activePath = window.sessionStorage.getItem('activePath')

        },
        methods: {
            //点击退出按钮,实现退出功能
            back() {
                //清空sessionStorage中的信息，编程时导航到登录页面
                window.sessionStorage.clear();
                this.$router.push('/login');
            },
            //获取左侧菜单数据
            async getmenuList() {
                const {
                    data: res
                } = await this.$http.get('menus');
                if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
                this.menuList = res.data;
                console.log(res);

            },
            //点击展开折叠的按钮
            togglebutton() {
                this.iscollapse = !this.iscollapse;

            },
            //保存链接的激活状态
            saveNavState(activePath) {
                window.sessionStorage.setItem('activePath', activePath);
                this.activePath=activePath;
            }
        }

    }
</script>
<style lang="less" scoped>
    .el-header {
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: white;
        font-size: 20px;

        >div {
            display: flex;
            align-items: center;

            img {
                width: 60px;
                height: 60px;
                border-radius: 50%;
            }

            span {
                margin-left: 15px;
            }
        }
    }

    .el-aside {
        background-color: #333744;

        .el-menu {
            border-right: none;
        }
    }

    .el-main {
        background-color: #eaedf1;
    }

    .home-container {
        height: 100%;

    }

    .toggle-button {
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>